JPS5831809B2 - Phase reversal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a phase inverter used in pumped storage power plants and the like.

Due to the requirement for small size and high reliability, gas insulation systems using insulating gas such as SF1 gas are adopted for switchgears such as breakers and disconnectors that constitute power generation and substations.

Even in devices that perform phase inversion, it is desirable to adopt a gas insulation method.

A closed type phase inversion device that meets this requirement is shown in FIG.

FIG. 1 is a perspective view of the phase separation configuration. 30 to 32 are electrical circuits forming a three-phase 1]*Vyw phase.

33 to 36 are gas insulated disconnectors, and 37 to 42 are gas insulated connection conductors.

In steady state, disconnectors 33 and 34 are closed, and disconnectors 35 and 36 are closed.
is open.

When performing phase inversion, 1. By opening the disconnectors 33, 34 and closing the disconnectors 35, 36, the other two phases 11. ■Switch.

In this way, in the conventional type, the gas insulated connection conductors 38 and 41 intersect three-dimensionally in order to perform phase inversion.
The container of each constituent unit has a complicated structure.

Moreover, since each disconnector is configured to be installed independently, it is difficult to match them from the installation surface, and assembly takes a long time.

In addition, as mentioned above, because it has a three-dimensional configuration,
In addition to increasing the height, mounting the phase inverter on a gas-insulated switchgear required a cradle with a wide angle due to earthquake resistance issues.

The present invention compensates for this drawback and aims, inter alia, to reduce the number of containers and to provide a phase inverter that is simple in construction and compact.

The present invention achieves the above objectives by effectively combining a multiphase bulk storage section and a phase separation section to reduce the number of required containers.

Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings.

Figure 2 is a partial sectional view of the phase inversion device, and Figure 3 is the
4 is a sectional view taken along the line -■, and FIG. 4 is a plan view of FIG. 2.

Two first containers 2 are connected to a central container 1, which is a cylindrical tank, lined up on one side (upper side in the second case).

Furthermore, as can be seen from FIG. 4, which is a plan view of FIG. 2, two phase separation containers 3 are connected to the central container 1 from side walls in parallel in the same direction.

These containers 1 to 3 may each constitute an airtight container by interposing an insulating spacer at each connection part, but in this example, each container constitutes one airtight container, The inside thereof is filled with an insulating medium such as SF6 gas.

Mechanism cases 4 are respectively mounted on the heads of the first containers 2ut2v (corresponding to the u-phase and ■-phase, but any two phases of the three-phase AC system may be used).

As shown in FIGS. 2 and 3, links 5 and 6 are provided on both sides of the mechanism case 4, respectively, and the link 5 is connected by a connecting rod 7, and the link 6 is connected by a connecting rod 8.

Connecting rods 7 and 8 are connected to actuators 9 and 10, respectively.

Although detailed drawings are omitted, the operating devices 9 and 10 are configured to independently drive the respective connecting rods back and forth in the axial direction thereof.

In each first container 2, as shown in FIGS. 2 and 3, movers 12 and 13 are provided which are connected to links 5 or 6 by insulating rods 11.

Furthermore, a stator 14.
15 is supported and arranged by an insulating support.

The armature 12.13 is always in contact with the other stator 17.18.

The stators 17 and 18 are electrically connected by a conductor 28, and are connected to a phase separation conductor 19 (not shown), for example, on the fl open/close position side.

The phase-separated conductor 19 is supported by an insulating spacer 20, which hermetically seals one end of the container as described above.

Although the details will be described later, the switching conductor 21 arranged in the center container 1 is connected to the stator 14 of the first container 211 and the first container 2v.
It is electrically connected to the stator 15 of.

In addition, the switching conductor 22 and the stator 15 of the first container 211
and the stator 14 of the first container 22 are electrically connected.

A phase separation conductor 23 is supported within each second container 3 by an insulating spacer 24 .

This insulating spacer 24 hermetically seals the other end of each of the containers described above.

The phase separation conductor 2311 connects the stator 14 in the first container 211 and the stator 1 in the first container 2v via the switching conductor 21.
Furthermore, the phase separation conductor 23v is electrically connected to the stator 15 of the first container 211 and the stator 14 of the first container 2v via the switching conductor 22.

Each of these phase separation conductors 23 is connected, for example, to the generator side.

Although not shown, the other W phase of the three-phase AC system is configured by a series of conductors housed in a container in the same way as in the case of FIG. 1.

In the state shown in FIG. 2, the mover 18 in each first container 2 connects the stators 14 and 17, and the phase-separated conductors 1911 and 231
r, and phase-separated conductors 19v and 23v are connected, respectively.

Therefore, each first container 2 and each phase separation container 3 have the same <11.
It leads the power opposite to V.

In case of phase rotation, it is sufficient to reverse the electrical connection between any two phases, so actuate the operating device 9 and drive each movable element 12 upward via the connecting rod 6, link 5 and insulating rod 11. ,
The movable element 13 is now lowered and connected to the stator 15 via a similar component.

As a result, the phase separated conductor 1911 becomes the phase separated conductor 23v.
, and the phase separation conductor 19v is connected to 2311, respectively.

Therefore, 11°■ from the phase separation vessel 3 is led as v, 11 from the first vessel 2, and phase inversion is completed.

It will be understood from the above description that the present device performs phase inversion.

Since both ends of the phase inversion device having such a configuration have a phase separation configuration, connection can be made without changing the phase separation configuration on the switchgear and generator sides.

Furthermore, since the conductors housed in the central container 1 are constructed in a multi-phase package, the number of containers is extremely small compared to the conventional case.

Therefore, the number of airtight connections is small, the work is easy, and the reliability is high.

First, by using a phase-separated structure at both ends and a multi-phase integrated structure at the middle part, an extremely compact phase inversion device was realized.

In this embodiment, the central container 1 is arranged horizontally, but the arrangement is not limited thereto.

For example, it can also be arranged vertically depending on the configuration of the opening/closing device.

At this time, if it is necessary to support the first container and the phase separation container 3, in addition to the center container 1, the containers 2 and 3 located at the bottom are supported.
It is preferable to provide a pedestal for supporting the container, and provide a support member between each container.

In other embodiments, the first container 2 can be connected to the side wall of the central container 1 on the same central axis as the phase separation container 3 shown in FIGS. 3 and 4.

In this way, various modifications can be made to suit the switching device and generator side.

Next, the structure inside the central container 1 will be explained.

5 is a cross-sectional view taken along the line ■--■ in FIG. 4, FIG. 6 is a cross-sectional view taken along the line Vl--Vl in FIG. 4, and FIG. 7 is a partially sectional perspective view.

As can be seen from the above figures, the conductors 21 and 22 in the center container 1 are arranged avoiding the connection openings A of the first container 2 and the phase separation container 3, and the conductors 21 and 22 are placed in support insulators 51 to 54, respectively.
is fixed to the side wall of the central container 1 by.

The phase separation conductor 2311 is connected to the switching conductor 21 with a curved portion, and the phase separation conductor 23V is connected linearly to the switching conductor 22.

Connecting conductor 50v connected to stator 14 in first container 2v
is connected to the switching conductor 21 directly below, and the connecting conductor 2911 connected to the stator 15 in the first container 2 is connected to the switching conductor 22 with a bent portion.

Connection conductor 50 connected to stator 14 in first container 211
11 is connected to the switching conductor 21 directly below, and the first container 21
The conductor 29v connected to the first stator 15 is connected to the switching conductor 22 with a bent portion.

Incidentally, even if the switching conductors 21 and 22 are arranged in reverse, the overall number of curved portions can be the same.

Further, when each first container 2 is connected to the side wall of the central container 1 on the opposite side of each phase separation container 3, the switching conductor 22 may be placed in the upper part of FIG. 5-6.

In this way, by arranging the two switching conductors 21 and 22 arranged in the central container 1 while avoiding the connection opening A with the first and second containers, the curved portion in the common container 1 can be avoided. It is possible to simplify the configuration by reducing the number of times.

As can be seen from the above explanation, the two first
The containers 2 are connected in parallel in the same direction, and two series of approximately U-shaped conductors are placed side by side within these containers.

For this reason, the number of containers and hermetic connections are extremely small.
There will be no more three-dimensionally intersecting containers.

Next, a different embodiment will be explained using FIGS. 8 and 9.

In the previous embodiment, a substantially U-shaped drawing room was formed inside the center container 1 and the first container 2, but in this embodiment, the structure of the container is different.

As can be seen from Figures 8 and 9, the first container 211
. ing.

Inside this approximately U-shaped container, the switching conductor 2 of the previous embodiment is placed.
1.22 and a series of substantially U-shaped conductors 81.82 corresponding to the connecting conductors 29.50 are juxtaposed.

Both ends of these conductors 81, 82 are located in the first container and are fitted with stators 14, 15, forming a switching section as in the previous example.

phase-separated conductors 23 connected to the series conductors 81 and 82, respectively;
The phase separation containers 3uy3v having voltages of 11 and 23V are respectively connected below the first container 2ut2v.

This embodiment also provides the same effects as the previous embodiment.

Further, the outlet pipes 80 are connected to the first containers 211 and 2v, respectively.
By connecting and providing the phase inversion device, there is only one airtight connection part between the flanges of the lead-out part 80.

In each of the above-mentioned embodiments, if the two sets of switching parts respectively configured in each first container 2 are both opened, they can be used as a disconnector, and the disconnector on the switching device side can be omitted.

However, if a disconnector for separating the gas-insulated switchgear and the generator is configured separately from the phase reversing device, a link configuration may be used in which the stators 14 and 15 are alternately switched by one operating device.

As explained above, the present invention includes two electrically insulated conductors each having a substantially U-shape, a switching conductor 21 and a connecting conductor, in a container having a substantially U-shape. 2911,30
A series of conductors consisting of 11 and a series of conductors consisting of switching conductor 22 and connecting conductor 29v=30v are juxtaposed, and the above-mentioned approximately U
In the character-shaped container, a switching part is formed at each end of the series of conductors, and the phase separation conductors 23u and 23v of the phase separation container 3 connected to the container 1 are electrically connected to the conductor on the shore, respectively. Therefore, it is possible to reduce the number of containers and the number of airtight connections, thereby obtaining a compact phase inverter.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional phase inversion device, FIG. 2 is a vertical cross-sectional front view showing an embodiment of the phase inversion device according to the present invention, and FIG. 3 is a cross section taken along the line ■-■ in FIG. Figure 4 is a plan view of Figure 2, Figure 5 is a sectional side view of the main part taken along line ■-■ in Figure 4, and Figure 6 is a side view of the main part taken along line VI-VI in Figure 4. 7 is a perspective view of the main sound screen in FIG. 2, FIG. 8 is a longitudinal sectional front view showing another embodiment of the phase inverter according to the present invention, and FIG. 9 is a perspective view of the main sound screen in FIG. 8. - It is a sectional view along the IX line. DESCRIPTION OF SYMBOLS 1... Center container, 2... First container, 3... Phase separation container, 14.15... Stator, 21, 22... Switching conductor, 29.50... For connection conductor.

Claims (1)

[Claims] 1 In a container having a substantially U-shape, two electrically insulated conductors forming a substantially U-shape are placed side by side along the container, and conductors are placed alternately at both ends of the side conductors in the container. A switching unit has a movable element that contacts the side conductor, and includes two sets of two phase-separated containers connected to the container, and one set of phase-separated conductors is electrically connected to each of the two conductors. death,
A phase inversion device characterized in that phase separation conductors of the other set are electrically connected to the movable element.